Insulator.



J. T, KLUGH.

INSULATOB.

APPLICATION FILED AUG.3, 1909. v A

97 1,61 9. I Patented Oct. 4, 1910.

JOHN '1. KLUGH, OF MADISON, MISSOURI.

IN SULATOR.

Specification of Letters Patent.

Patented Oct. 4, 1910.

Application an August a, 1909. Serial No. 511,041.

To all whom it may concern:

Be it known that I, J OHN T. KLUGH, citizen of the United States, residing at Madison, in the county of Monroe and State of Missouri, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

This invention relates to insulators and has for its object to provide acomparatively simple and inexpensive device of this character especially designed for supporting the line wires on telegraph poles and the like.

A further object of the invention is to provide an insulator, the supporting pin of which is provided with resilient clamping jaws adapted to embrace the major portions of the insulator sections, there being seating recesses formed in said sections for'the reception of the clamping jaws so that the latter will be disposed flush with the interior surface of the insulator, and thus not offer any obstruction to the adjacent line, wires. v A further object is to provide an insulator, the mating sections of which may be removed fromor inserted between the clamping jaws of the supporting pin from either the top or the opposite en s of the latter.

A still further object of the invention is generally to improve this class of devices so as to increase their utility, durability and efliciency. I

Further objects and advantages will appear in the following description, it being understood that varlous changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims.

For a full understanding of the invention and the merits thereof and also to acquire aknowledge of the details of construction and the means for effecting the result, ref

erence is tobe had to the following descri tion and accompanying drawings, in who Figure 1 is a perspective view of an 1nsulator constructed in accordance with my invention showing the same in position on the cross arm of a telegraph pole, a portlon of the cross arm being broken away to expose the shank of the supporting pin; F g. 2 is a vertical sectional view of the devlce detached from the supporting arm; Fig. 3 is a perspective view of the u per portion of the supporting pin, the insu ator sectlons being shown in position to be inserted between the clamping jaws and the securlng bolt and nut on opposite sides of said jaws; Fig. 4 is a transverse sectional view taken on the line 44 of Fig. 2.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The improved insulator forming the subject matter of the present invention com prises a longitudinally split supporting pin 5, preferably rectangular in shape as shown, and provided with a reduced threaded shank 6 adapted to be screwed or otherwise embedded in the cross arm 7 of a telegraph pole. The upper ends of the resilient arms 8 of the supporting pin, are extended laterally to form concavo-convex clamping jaws 9 adapted to enter seating recesses 10 formed in the insulator sections 11. The insulator sections 11 may be formed of glass, porcealain orother suitable material and are pro vided with longitudinally disposed seating grooves 12 arranged at the abutting faces of the insulator sections and having their walls roughened or corrugated at 13 for engagement with the line wire 14.

Attention is here called to the fact that the seating recesses 10 terminate short of the top of the insulator and gradually decrease in depth'from the shoulders 15 to the bottom of the insulator so that whenthe clamping jaws 9-embrace the insulator sections 11, the outer faces of the jaws will be disposed flush with and form a continuation of the top wall of'the insulator, thus not to offer any obstruction to the adjacent line wires when the supporting pin is used on the cross arm of a telegraph pole.

Asa means for clamping the jaws 9 in engagement with the insulator sections 11, the

arms 8 thereof are provided with transversely alined perforations 16 adapted to receive a bolt or similar fastening device 17, which latter extends through the erforations 16 for engagement with a c amping nut 18.

By making the groove 10 of gradually decreased depth from the top of the insulator to the bottom thereof, the sections 11 may be readily removed from the to of the supporting pin, the inherent resi ient properties of the clamping jaws 9 permittingsufiicient expansion of said jaws when the fastening device 17 is partially released to permit the ready withdrawal of the insulator sections. This gradual decrease .of the recesses are inclined or beveled at 19 so that when the fastening device or bolt 17 is I loosened, the insulator sections 11 may also be removed through the opposite ends of the clamping jaws, the inclined faceslt) permitting said sections to be readlly wlthdrawn from the clamping jaws.

Thus it will be seen that there is provided an insulator which when in position on the supporting pin will present 'a smooth and unobstructed exterior surface so that liability of the insulator catchingon adjacent line wires is positively eliminated. I, a

Having thus described the invention, what is claimed as new is: 1. A device of the class described including an insulator having a circumferential recess formed therein and gradually decreasing in depth from a point adjacent the top of the insulator to the bottom thereof, and a longitudinally split supporting pin having means at one end thereof for engagement with a support and provided at its other end with clamping javys adapted to enter the seating recess in the insulator, the exterior walls of the clamping aws being devoid of same '7 ing oppositely disposed stop shoulders at the top of the insulator, said recess gradually decreasing in depth from the shoulders to 4 s the bottomof the insulator and having'itsf side walls beveled, a longitudinally split supporting pin having means at one end thereof for engagement with a support and having its other end provided with clamping jaws adapted to enter the seating recess in the insulator and having their opposite ed es beveled for engagement with the beve ed walls of said seating recess, anda fastening delvice extending transversely through the sp 1t exterior walls of the clamping jaws bein devoid of surfaceprojections and disposed flush yvith and forming a continuation of the top of the insulator between said stop shoulders.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN T. KLUGH. [L. a] Witnessesr I J. W.' Arrnnsonr,

Vroron N. NonL.

portion of the pin forclamping the aws in engagement with the'insulator, the 

